I use Speedo suits for fitness swimming in pools. This suit runs smaller than other similar "core" Speedo swimsuits, even ones with the same back style. I had to order one size larger than what is recommended by their size chart for my torso length (and than what I normally wear), which is two sizes larger than my normal dress size. Speedo was extremely helpful through this process, but I recommend ordering multiple sizes to get the right fit if you are not sure. The label does not specifically state "LYCRA® XTRA LIFE™", but I'm hoping it will last as long as their suits made of this material, which are definitely superior. (I'm giving it 5 stars based on this assumption, but I'll know more later after I swim in it a season). Both layers are nylon-lycra which is the most comfortable combination for me; (I don't like their polyester fabrics or their recycled nylon). At this time, though, you can't always trust the website fabric descriptions. Hopefully Speedo will fix this soon, and continue to make suits from a long-life (non recycled) nylon-Lycra for both layers. These are great suits, Speedo, for those of us who swim a lot of laps! We thank you for them!